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以实际刊发为准
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ZHANG Qiang, QIU Haotian, QING Jiale, LIN Jinchi, YANG Jinhui, XIE Shuibo
2026,43(1)
Abstract:
With the rapid development of industry, a large amount of industrial pollutants are discharged into water bodies, causing serious water pollution and posing a major threat to human health. Plant polyphenol nanomaterials (PNs), which combine the excellent properties of plant polyphenols and nanomaterials, show remarkable potential for application in water pollution control.The application of PNs in the field of medicine has been widely studied, but their application in environmental fields, such as water pollution control and soil remediation, is still in its infancy. This paper briefly describes the preparation methods of PNs, including one-pot, hydrothermal, and metal-polyphenol network (MPN) methods, and the optimization process of polyphenol-metal nanomaterials; focuses on the adsorption performance and adsorption mechanism of organic pollutants, pathogenic microorganisms, and ions of heavy metals (Cr, Pb, As, etc.); and outlines the effects on adsorption efficiency of the particle size and specific surface area, the type and structure of polyphenols, temperature and pH, coexisting ions and ionic strength; and finally, the future challenges and opportunities for PNs are envisioned.
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CHE Kangbo, YUAN Wei-si, DAI Bai-yan, ZHAO Yinan, ZHANG Shu-biao
2026,43(1)
Abstract:
Poly (lactic-co-glycolic acid) (PLGA) is composed of lactic acid and glycolic acid monomers. It is the first biodegradable polymer to receive Food and Drug Administration (FDA) approval. PLGA is widely used in biology and medicine as a new delivery vector because of its structural adjustability, fast biodegradation rate and good biocompatibility. The modified PLGA nanoparticles (NPs) can effectively regulate drug release, enhance targeting, and greatly improve drug delivery efficiency, which has become a drug delivery vector with great potential in the biomedical field. This article comprehensively reviews the modification strategies of PLGA in recent years from two aspects, such as polymer (PEG, chitosan, etc.) modification and biomimetic cell membrane (such as cancer cell membrane, macrophage membrane, T cell membrane) modification, and its application in cancer immunotherapy. The immune mechanisms triggered by PLGA are also analyzed.At the same time, the limitations of PLGA NPs in clinical application and their wide application prospects in more fields in the future were proposed.
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JIANG Kun, ZHANG Qian, WU Kai, ZHENG Yuanbo, WANG Weiqiang, YU Qinwei, YANG Jianming
2026,43(1)
Abstract:
Facing the increasingly serious global climate change problem, it is generally recognized that developing a circular economy is an important way to solve the problems of resource and environmental constraints and climate change. Green hydrogen, as a "carbon neutral hydrogen", mainly comes from processes such as hydrogen production from biomass, electrolytic water splitting, and photocatalytic water splitting. Its application forms include hydrogen fuel cells, hydrogen internal combustion engines, and industrial hydrogen, among which hydrogen fuel cells are the most promising hydrogen energy utilization technology. This paper reviews the working principles, advantages and disadvantages of various green hydrogen production technologies, compares the performance differences and application fields of different hydrogen fuel cells, and summarizes the advantages, bottlenecks and future development directions of current hydrogen production and utilization technologies. In the future, green hydrogen technology can focus on: developing efficient catalysts and fermentation processes for biological hydrogen production; breaking through material limitations, reducing costs and increasing efficiency in electrolytic water splitting/photocatalytic water splitting/hydrogen fuel cells; and solving transportation bottlenecks through the coupling of green hydrogen and green ammonia storage and transportation to promote large-scale applications in multiple scenarios.
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JIAO Yang, GUO Yu-chen, WEI Xue-ling, ZOU Xiang-yu, JIA Fei-hong
2026,43(1)
Abstract:
Hydrogen production by water electrolysis is regarded as an ideal solution to the escalating global energy crisis and environmental pollution due to its high purity, cleanliness, and compatibility with photovoltaic and wind power. However, the overall water splitting electrocatalysts of low-cost, highly active, and durable for using in alkaline media remains a considerable challenge. In this study, a three-dimensional Ni3S2/CeO2@NF heterostructured catalytic electrode was synthesized using a two-step hydrothermal method, with its phase, morphology, and structure systematically characterized through XRD, XPS, SEM, and TEM analyses. The HER and OER performances of Ni3S2/CeO2@NF were evaluated in 1 M KOH solution, revealing that the strong interfacial synergy between Ni3S2 and CeO2 significantly enhances electron transfer capabilities, resulting in high catalytic activity for both HER and OER. Utilizing Ni3S2/CeO2@NF as both the cathode and anode in an electrolytic cell achieved a current density of 10 mA/cm2 at
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Modification of polypropylene honeycomb materials and performance in purifying indoor air pollutants
HUANG Chao-qiang, ZENG Gui-feng, JI Wen-jin, CHENG Gao, DOU Yong-shen, LIU San-mao, LI Yong-feng
2026,43(1)
Abstract:
The effects of different modification methods on the performance of polypropylene (PP) honeycomb materials for purifying air pollutants, such as ammonia and trimethylamine, were investigated. A series of integrated indoor air purification materials were prepared by loading aluminum oxide and metal ion active components onto the PP substrate using a coating technique. The optimal preparation conditions were identified as follows: a PP honeycomb substrate pore size of 2.0 mm, choosing aluminum sol as the aluminum source, the pore-forming agent concentration of 0.1 mol/L, using calcium (Ca2?) and ferric (Fe3?) ions as modified metal ion type, the metal ion concentration of 0.3 mol/L, and impregnation coating time of 10 minutes. The resulting Ca2?/Fe3?-modified PP honeycomb purification materials achieved saturated ammonia adsorption capacities of 42 and 40 mg/mL, respectively. Furthermore, their ammonia purification performance remained stable after multiple thermal regeneration cycles. Finally, the as-prepared modified PP honeycomb materials were installed in air purification devices with different sizes and tested in 100 L and 30 m3 environmental cabin, respectively, still exhibiting good ammonia removal efficiency.
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ZHENG Jia, ZHANG Ji, WANG Pong, CHEN Shang-yan, WANG Zong-de, XU Ya-zhou
2026,43(1)
Abstract:
The preparation of conventional bisphenol A-based epoxy resins is highly dependent on fossil energy, and in order to avoid overdependence on petrochemical resources, the development of renewable bio-based resins to replace conventional petroleum-based epoxy resins has received widespread attention. However, bio-based epoxy resins usually have low mechanical properties and poor degradation properties due to the highly permanent cross-linking network of conventional epoxy resins. In this study, an epoxy resin was prepared from camphoric acid, which was cured with polyether amine D230 to prepare a high mechanical property and degradable crosslinked network of camphoric acid-based epoxy resin. It was shown that the camphoric acid-based epoxy resin exhibited excellent mechanical properties due to the introduction of a rigid five-membered ring skeleton structure of camphoric acid, with a tensile strength of up to 75 MPa. In addition, due to the introduction of an ester group into the camphoric acid-based epoxy resin network, the material exhibited excellent degradation properties. The resin can be rapidly degraded in 100 ℃ in ethanolamine within 250 min by the amidation reaction between the ester group and the amino group.
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LIU Chao, YANG Cang, TANG Yu-fan, BAO Yan, JIAO Zhen, DI Ning-yu, LU Yun-feng
2026,43(1)
Abstract:
Carbon quantum dots (CQDs) and choline amino acid ionic liquid (ILs) were prepared from biomass materials, and CDILs composite lubricant was obtained by modifying CQDs with ILs. The structure and morphology of CDILs were characterized by FTIR, NMR and TEM, and the effects of the addition of CQDs and CDILs on the tribological properties of water-based lubricants and the related friction mechanism were studied using the friction coefficient and volume wear rate as the indexes. The results show that the friction coefficient and volume wear rate of the water-based composite lubricant are 0.14 and 1.91×10-9 mm3/ (N·m), respectively, when the addition of CDILs is 0.3 wt%, which are 33% and 36% lower than that of pure water. In the friction process, CDILs plays an excellent synergistic role in forming a continuous, uniform and firm self-lubricating transfer film on the metal friction surface, preventing direct contact with the grinding surface, and making its composite lubricant have more lasting anti-friction and wear resistance.
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GUO Lin-xin, QIANG Tao-tao, WANG He-ping, SU Wen, ZHAO Fan-rong, ZHANG Le
2026,43(1)
Abstract:
The crude tannin extract of Coriaria nepalensis leaves was prepared by using C. nepalensis leaves as raw materials, and then the crude tannin extract was purified by resin purification method. Based on static and dynamic adsorption and desorption experiments, the optimum purification process conditions of crude tannin extract were established. Further, the purified tannin was used as a cross-linking agent to crosslink with the gelatin material to prepare a tannin gelatin composite film material. The mechanical properties, light transmittance and antioxidant properties of tannin cross-linked gelatin films were investigated by FTIR, UV-Vis, electronic universal testing machine, hydroxyl radical scavenging method and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method. The results showed that the optimum process for preparing the purified tannin from C. nepalensis leaves was as follows: AB-8 macroporous resin was used as the adsorption material, the sample concentration was 2.0 mg/mL, the flow rate was 3 BV/h, and the pH was 5, the tannin solution was 4 BV, and after 3 h of adsorption, 5 BV of 60% ethanol solution was added at a flow rate of 3 BV/h for elution. The purity of tannin from C. nepalensis leaves could be increased from 27.3% to 65.6%. Compared with the blank gelatin film, the elongation at break of the tannin cross-linked gelatin film prepared by adding 2% purified tannin of gelatin mass increased by 81.6%, and the tensile strength increased by 94.9%. The tannic cross-linked gelatin film had strong absorption of ultraviolet light (T <10%) in the range of 250~390 nm, and the transparency value increased from 0.72 to 0.98. Compared with the blank gelatin film, the DPPH free radical scavenging rate of tannin cross-linked gelatin film increased from 5.4% to 42.3%, and the hydroxyl radical scavenging rate increased from 3.3% to 37.6%.
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LI Jin-zhi, HAO Yu-peng, WU Ya-nan, ZHANG Wen-qi, TANG Bing-tao, ZHANG Yu-ang
2026,43(1)
Abstract:
In order to realize the temperature regulation of phase change materials and solve the problem of leakage in practical applications, binary organic eutectic phase change materials (EPCM) were prepared by melting blending method using capric acid and methyl palmitate as raw materials, citric acid (CA) and carboxylated cellulose nanofiber dispersion (CNF) were used as raw materials, double cross-linked CA-Fe3+-CNF-Fe2O3 aerogels were prepared by sol-gel method, and finally EPCM was loaded with double cross-linked CA-Fe3+-CNF-Fe2O3 aerogels as carriers. Composite stereotyped phase change material (CA-PCM) was prepared, the eutectic points of capric acid and methyl palmitate were determined by step cooling curve, binary phase diagram and DSC, the influence of the mass fraction of CA (based on the total mass of CA and CNF, the same below) on its micromorphology was investigated based on SEM characterization, and EPCM, aerogel and CA-PCM were characterized and tested by FTIR, XRD, DSC, TGA, etc., and CA-PCM was used as the insulation material. Test its thermal buffering performance in building models. The results show that m(capric)∶m(methyl palmitate)=61∶39 is the actual eutectic point of capric acid and methyl palmitate, and the eutectic system (EPCM1) is formed by physical mixing, and the phase transition temperature is 24.3 °C and the enthalpy of phase change is 172.4 J/g. The aerogel prepared with 1% CA-Fe3+-CNF/Fe2O3 with 1% CA mass fraction was more and more uniform, and the morphology was more regular. The 1% CA-Fe3+-CNF/Fe2O3 aerogel was loaded with EPCM1 as the skeleton, the loading rate reached 85.57%, the phase transition temperature of the prepared 1% CA-PCM was 24.7 °C, the enthalpy value was 125.2 J/g, and the phase change temperature and enthalpy value did not change significantly after 100 cold and hot cycles. Compared with the foam model using plastic foam, the heating time of the PCM model using 1% CA-PCM as the building insulation material was increased by 51.3% and the cooling time was extended by 43.5%.
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ZHU Lin-hai, KONG Miao, ZHANG Wenqi, YAN Wenjin, ZHANG Yu-ang, TANG Bingtao
2026,43(1)
Abstract:
Lithium-sulfur (Li-S) batteries possess a higher theoretical specific capacity compared to traditional lithium-ion batteries, showing promising application prospects in the field of electrochemical energy storage and are expected to become the next generation of battery energy storage systems. However, during the charging and discharging processes of Li-S batteries, issues such as poor conductivity of the cathode active material, volume expansion upon cycling, and the shuttle effect of lithium polysulfides significantly reduce the battery"s specific capacity and cycle life, thus constraining its further development. To address the aforementioned problems of Li-S batteries, this paper prepared a single-atom cobalt-doped MOF-derived carbon material with a hierarchical porous nanostructure (Co-NHPC) using a hard template method as a sulfur host material for Li-S batteries. The Co-NHPC prepared under the influence of the templating agent has a higher specific surface area (1856 m2?g-1) than ordinary MOF-derived carbon materials, with a significant increase in the proportion of macropores and mesopores, resulting in an obvious physical adsorption effect on lithium polysulfides. The combination of Co-NHPC carbon material with elemental sulfur significantly enhances the electron transfer rate at the cathode. Its complex hierarchical porous structure not only restricts the shuttling of lithium polysulfides but also buffers the volume expansion of the cathode active material during charge-discharge cycles. By doping cobalt ions into MOFs in one step, cobalt atom can be in-situ doped within the Co-NHPC carbon material. Benefiting from the hierarchical porous structure of Co-NHPC, cobalt atom have a larger contact area with lithium polysulfides, thereby chemically adsorbing lithium polysulfides and fully participating in electrode reactions, accelerating the conversion of lithium polysulfides. The assembled Li-S battery with this cathode material exhibits excellent long-term cycling stability, achieving an initial discharge specific capacity of 664 mAh?g?1 at a rate of 0.5 C and maintaining an average capacity decay rate of 0.06% per cycle after 500 charge-discharge cycles.
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QIN Ye, ZHAO Haidong, WANG Jing
2026,43(1)
Abstract:
To enhance the electrochemical reactivity of carbon felt (CF) employed as the negative electrode in vanadium batteries, MXene material (Ti3C2Tx) was synthesized through HF acid etching using Ti3AlC2 as the precursor. Subsequently, Bi2O3 particles were grown on both the interlayer and surface of MXene via a solvothermal method to produce Bi2O3@MXene. Finally, the Bi2O3@MXene/carbon felt electrode was fabricated by impregnating and drawing it onto carbon felt.The microstructure, structural composition, and hydrophilicity of the Bi2O3@MXene/carbon felt electrode were characterized and analyzed using XRD, SEM,XPS,BET surface area analysis, and contact angle measurements.The electrochemical properties of the Bi2O3@MXene/carbon felt electrode, including cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), were evaluated using an electrochemical workstation in conjunction with a three-electrode system.The charge-discharge performance of an asymmetric vanadium battery, utilizing carbon felt as the positive electrode and a Bi2O3@MXene/carbon felt composite as the negative electrode, was thoroughly investigated.The results indicate that the specific surface area of Bi2O3@MXene/carbon felt has increased to 4.93 m2/g, representing a 63.7% enhancement. Additionally, the contact angle of the electrolyte has decreased to 85.7°, reflecting a reduction of 44.7° compared to that of the carbon felt electrode.At a current density of 400 mA/cm2, the energy efficiency of the BMC-C battery attains 71.2%.The BMC-C battery underwent continuous charging and discharging for 500 cycles at a current density of 200 mA/cm2, demonstrating stable battery energy efficiency at approximately 81%.The enhancement of electrochemical and battery performance can be primarily attributed to the growth of Bi2O3 particles both between and on the surface of MXene. This growth improves the hydrophilicity and specific surface area of the electrode, thereby increasing the number of reactive active sites. Furthermore, the excellent cycling stability is ascribed to the inhibition of MXene structure stacking by Bi2O3 particles located between the layers.
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LI Zhi-yi, WANG Cheng-wei, SUN Haili, WEI Wei, LIU Feng-xia, LIU Zhi-jun
2026,43(1)
Abstract:
Lithium cobalt phosphate (LiCoPO4) is a lithium ion battery cathode material with olivine structure, which has a high voltage platform of 4.8V and a high theoretical capacity. Using a mild solvothermal method assisted by ascorbic acid, the morphology and particle size of LiCoPO4 material were optimized by regulating the solvothermal reaction time and calcination temperature, thereby improving its electrochemical performance. The results showed that the plate-like LiCoPO4 particles were obtained when the solvent-thermal reaction time was 9 h. When the calcination temperature is 700℃, the plate particles have the shortest [010] direction length. Finally, LiCoPO4 (163.21 mA h/g) material with the best specific discharge capacity was obtained. The electrochemical performance of LiCoPO4 was significantly improved by doping with Fe2+. Further investigation into Fe2+ doping of LiCoPO4 revealed that when the Fe2+ doping level reached 9%, the synthesized LiCo1-xFexPO4 sample exhibited the best cycling performance and rate capability. At a charge-discharge rate of 0.1C, the sample achieved a capacity retention of 77.65% after 30 cycles.
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2026,43(1)
Abstract:
In order to realize the efficient separation and capture of CO2 in humid flue gas, Organic amine polymer (TP) was coated on the surface of metal organic framework (MOFs) material MIL-101(Cr) by supramolecular assembly method, and then polydimethylsiloxane (PDMS) was deposited on the outer surface of the material by vapor deposition method. Hydrophobic core-shell composite MIL-101(Cr)@TP-PDMS was constructed and used for the adsorption and separation of CO2 in humid flue gas. The structure, morphology and thermal stability of MIL-101(Cr)@TP-PDMS were characterized and tested by FTIR, XRD, SEM, TEM, EDS and TGA. The separation and adsorption selectivity of MIL-101(Cr)@TP-PDMS for CO2/N2 (volume ratio 15:85) mixture was evaluated by adsorption experiments. Based on the breakthrough experiment, the effects of different relative humidity and gas flow rate on the adsorption capacity of CO2 and the cyclic adsorption stability of MIL-101(Cr)@TP-PDMS were investigated. The results showed that the specific surface area (1432 m2/g) and pore volume (0.713 cm3/g) of MIL-101(Cr)@TP-PDMS decreased compared with that of MIL-101(Cr) (2342 m2/g and 1.172 cm3/g), but there was no change in pore size distribution; a layer of about 10 nm of encapsulated CO2 on the outer surface of MIL-101(Cr)@TP-PDMS was attached a coating layer of about 10 nm; The CO2 adsorption capacity (38.28 cm3/g) and CO2/N2 separation and adsorption selectivity (388) of MIL-101(Cr)@TP-PDMS were improved by the hydrogen bonding between the imine bond of the coated TP and CO2, which were 1.7 times and 31.3 times of the CO2 adsorption capacity (22.5 cm3/g) and CO2/N2 separation and adsorption selectivity (12.4) of MIL-101 (Cr); The deposited PDMS realized the hydrophobic modification of MIL-101(Cr), and the water contact angle increased from 26.6° of MIL-101(Cr) to 134.9° of MIL-101(Cr)@TP-PDMS, which made MIL-101(Cr)@TP-PDMS maintain CO2 / N2 separation and adsorption selectivity and CO2 saturated adsorption capacity (38.28 cm3/g) under different relative humidity (40%~80%) conditions, and the performances were stable after 15 dynamic breakthrough tests.
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LIU Chunbiao, ZHENG Chuanyun, LOU Peng, LIN Jiahong, FENG Quan, ZHAO Baobao
2026,43(1)
Abstract:
IIn order to develop a hollow fiber ultrafiltration membrane with low cost and excellent performance, CPVC/SPSF blend hollow fiber ultrafiltration membrane was prepared by solution immersion precipitation phase conversion process using cheap chlorinated polyvinyl chloride (CPVC) as film forming polymer and sulfonated polysulfone (SPSF) as hydrophilic modification additive. The effects of SPSF mass fraction on the structure and properties of CPVC/SPSF blended hollow fiber ultrafiltration membrane were investigated based on the characterization and testing of FTIR, SEM, DSC, DTG and contact Angle, as well as the determination of porosity, pure water flux and BSA retention. The results show that the mixing enthalpy (ΔHm) of the CPVC/SPSF blending system is less than the critical value (4.168×10-2 J/mol), and the CPVC/SPSF blending system is fully compatible. With the increase of SPSF mass fraction from 0 to 1.20%, the porosity of CPVC/SPSF blended hollow fiber ultrafiltration membrane increased from 15.20% to 22.50%. Water contact Angle decreased from 102.20° to 80.60 °. The pure water flux increased from 65.30 L/(m2·h) to 182.10 L/(m2·h), and the BSA interception rate decreased from 95.78% to 88.17%. When the mass fraction of SPSF was 0.60%, the breaking strength and breaking elongation of CPVC/SPSF blended hollow fiber ultrafiltration membrane were the maximum values, which were 0.1585 cN/dtex and 26.4%, respectively.
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TANG Rong, GONG Shu, ZHENG Shμn-tong, LIU Tian, YE Xiao-tong, GONG Ji-yi, YI Yin, LIU Wen-hua
2026,43(1)
Abstract:
Crude flavonoids were extracted by ultrasonic assisted alcohol extraction. The effects of ultrasonic time, solid-liquid ratio (g∶mL), ethanol mass fraction and ultrasonic power on flavonoids extraction were investigated by single factor experiment and orthogonal experiment. To improve the purity of flavonoids from Ficus hirta vahl by static and dynamic purification with macroporous resin. The effects of macroporous adsorption resin type, mass concentration of crude flavonoids and pH value on static and dynamic purification were investigated. Based on MTT assay, nuclear staining, reactive oxygen species detection and flow cytometry, the inhibitory activity of purified Ficus hirta vahl flavone on HepG2 cells was investigated. The results showed that the optimal extraction conditions of crude flavonoids from the single factor experiment and orthogonal experiment were as follows: Under the conditions of 90 min ultrasonic time, 1∶40 solid-liquid ratio (g∶mL), 80% ethanol mass fraction and 400 W ultrasonic power, the average extraction amount of flavonoids was 5.720±0.713 mg/g, and the purity of crude flavonoids was 6.05%. The macroporous adsorption resin AB-8 showed the best purification performance. The optimal static purification conditions of the crude flavonoids were 0.7408 mg/mL, pH = 4, and the mass fraction of the desorption solution was 60%. The optimal dynamic purification conditions of the crude flavonoids were 0.2408 mg/mL. pH = 4, the loading volume was 65 mL, the mass fraction of eluent was 60%, and the amount of eluent was 40 mL. The purity of flavonoids was increased from 6.05% to 32.67% by dynamic purification of AB-8. AB-8 purified Ficus hirta vahl flavonoid can inhibit the proliferation of HepG2 cells, reduce cell survival rate, and promote cell apoptosis.
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2026,43(1)
Abstract:
This study focuses on the extraction of Podophyllum emodi polysaccharides (PEP) using an ultrasound-assisted ionic liquid method, optimizing the extraction process through single-factor and response surface methodologies. The crude polysaccharides were purified using DEAE-650M cellulose column chromatography and Sephadex G-750 gel , obtioning two polysaccharide fractions (PEP-I and PEP-II). The physicochemical properties and structural characteristics of the purified polysaccharides were characterized using modern chromatographic and spectroscopic techniques, alongside evaluations of their antioxidant and hypoglycemic activities. The optimization results revealed that the optimal extraction conditions for PEP were an liquid to material ratio of 40:1 mL/g, extraction temperature of 53 °C, and extraction time of 91 min, with 1.0% concentration of 1-butyl-3-methylimidazolium chloride (BMIMCl), achieving an extraction yield of 39.79±0.17%. PEP-I is identified as a neutral pyranose polysaccharide with a molecular weight of 27.32 kDa, exhibiting α and β anomeric configurations and a triple helix conformation. It is primarily composed of rhamnose (61.85%), mannose (19.36%), and arabinose (5.85%), showing an uneven morphology with some regions exhibiting network-like structures. On the other hand, PEP-II is an acidic pyranose polysaccharide with a molecular weight of 33.48 kDa, mainly consisting of rhamnose (52.89%), xylose (12.63%), and glucose (12.99%), along with traces of proteins and uronic acids, displaying a smooth plate-like film with minor fragmentation. Furthermore, both PEP-I and PEP-II exhibited a coexistence of crystalline and amorphous structures along with good thermal stability. Antioxidant activity tests demonstrated that the maximum half-inhibitory concentrations (IC50) of PEP-I and PEP-II against DPPH, ABTS+, and hydroxyl radicals were 1.832 mg/mL and 0.734 mg/mL, 1.634 mg/mL and 0.862 mg/mL, and 1.941 mg/mL and 0.926 mg/mL, respectively. The IC50 values for α-glucosidase and α-amylase inhibition were recorded as 3.021 mg/mL and 2.432 mg/mL, 3.242 mg/mL and 2.398 mg/mL, respectively. These findings indicate that Podophyllum emodi polysaccharides possess significant antioxidant and hypoglycemic activities.
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WU Kun, ZHENG Heping, LIANG Hong, CHEN Xiankun, TANG Jianhua
2026,43(1)
Abstract:
To modulate the acid properties of Br?nsted acid sites on zeolites to improve their catalytic performance and prolong the lifetime of catalysts, Zr-doped SAPO-34 (ZrAPSO-xZr) was prepared by hydrothermal method. The bifunctional catalysts ZnZrOz/ZrAPSO-xZr were made by mixing them with ZnZrOz metal oxides at 1:1 mass ratio. The structural composition, microscopic morphology, and surface properties of ZrAPSO-xZr were characterized and tested by XRD, SEM, FTIR, BET, NH3-TPD, and Py-IR. Based on the synthesis of light olefins from syngas [n(H2)/n(CO)=2], the effects of Zr doping amount [x, where n(Al2O3): n(ZrO2)=1.0:x] on the catalytic performance and lifetime of ZnZrOz/ZrAPSO-xZr were investigated. The results demonstrated that the optimum Zr doping amount (x) of ZrAPSO-xZr was 0.1 mol. Zr doping increased the specific surface area of SAPO-34 zeolite (162.29 m2/g) and decreased the density of its Br?nsted acid sites (0.339 μmol/m2), and ZrAPSO-0.1Zr reached 441.88 m2/g and 0.229 μmol/m2. The addition of Zr made a more dispersed distribution of Br?nsted acid sites and prevented carbon accumulation from blocking the zeolite pores. Under the reaction conditions of H2/CO=2/1、400℃、3 MPa and GHSV=3000 mL/(gcat·h), the light olefin selectivity of ZnZrOz/ZrAPSO-0.1Zr only slightly decreased from 81.31% to 76.65% even the reaction time extended to 2400 minutes. ZrAPSO-0.1Zr had more acid sites (1.437 mmol/g) and a larger pore size (9.80 nm), which was favorable for providing sufficient active sites and mass transfer space for light olefins and preventing carbon deposition blocking the channels of zeolites.
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ZHANG Meng, WANG Yi-long, LIU Zhi-dan, SHI Xiao-hui, LIU Ai-jie, YI Xia, ZHU Jie
2026,43(1)
Abstract:
In this study, we constructed a functional nanoparticle system with elastin-like polypeptide (ELP) depending on the self-assembly property of coat protein (CP) from cowpea chlorotic mottle virus (Cowpea chlorotic mottle virus, CCMV). The two fusion proteins of native ELP-CCMV (ELP-CCMV CP, NCP) and ELP-CCMV with mutant amino acids were separately successfully expressed in E. coli BL21 after structural functionalization through cloning an ELP at the N-terminus of CP. Compared with the yield of NCP (74 mg/L), that of VCP was increased by 83.78%, and thus suggesting that the expression of VCP was better than that of NCP. The above fusion proteins could form the stable virus-like particles (VLPs) through self-assembly and effectively encapsulate Pt nanoparticles in response to multiple conditions of pH value, low concentration of salts and temperature. Meanwhile, VCP completed self-assembly under mild conditions (neutral pH, low concentration of salts and room temperature). The apparent rate constant of Pt@VCP nano-catalyst (0.17 min-1) was 2.8 times than that of the citric acid modified Pt-CA nanocatalyst in 4-nitrophenol reduction reaction catalyzed by VLPs, and thus indicated Pt@VCP was of excellent catalytic activity. Pt@VCP with the apparent activation energy 22.0 kJ/mol was also of lower energy barrier when compared with that of Pt@VCP (14.1 kJ/mol). The superior catalytic activity of Pt@VCP was attributable to confinement effect of the protein nanocage Pt@VCP and synergistic effect of the substrate 4-nitrophenol, Pt nanoparticles and surface functional group of the VLPs.
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ZHONG Meng-ru, TIAN Bin, SI Qi, WANG Xing-bao, LI Jing-ying, XU Long
2026,43(1)
Abstract:
A mixed-crystal TiO2 was prepared by the sol-gel method for the degradation of the water pollutant metformin (MET) under ultraviolet light. The structure and photocatalytic activity of mixed-crystal TiO2 were explored by various characterization methods. The degradation mechanism of MET is revealed by degradation kinetics calculations, radical trapping experiments, and analysis of degradation products. SEM, TEM, XRD and FTIR showed that the TiO2 prepared at the optimal calcination temperature of 550 °C was a mixed crystalline structure, containing 77% anatase and 23% rutile, and the morphology was 20 nm spherical aggregation structure. The degradation experiments of MET showed that the effect of mixed crystal was better than that of single crystal, which was due to the oxygen vacancy/Ti3+ and narrow band gap of mixed TiO2. The MET degradation process conformed to the first-order kinetic model, and the degradation rate constant was 0.016 min-1. At the pH of 11, the degradation rate of MET reaches up to 78.03%, which is 2.2 times than anatase-type TiO2. Radical trapping experiments demonstrate that the degradation of MET follows a mechanism involving hole and ?OH、?O2? oxidation. Through the in-depth analysis of the degradation products, four degradation reaction paths were proposed. Furthermore, after five consecutive cycles, the catalyst exhibits only a 2.59% decrease in the degradation rate of MET, indicating its high photocatalytic activity and stability.
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CHEN Jia-ming, YANG Jia-ni, KANG Hai-lan, FANG Qing-hong, LI Long, ZHANG Xiao-dong
2026,43(1)
Abstract:
To enhance the practical application of activated carbon (AC) in dye wastewater treatment, this study prepared a porous Eucommia rubber fiber membrane (P-EF) via electrospinning and further loaded hydrogen peroxide-modified activated carbon (HMAC) to develop a high-efficiency adsorption material (P-EF-HMAC). Adsorption performance tests revealed that the maximum adsorption capacity of P-EF-HMAC for methylene blue (MB) at 298.15K reached 230.8 mg/g. Kinetic analysis demonstrated that the adsorption process adhered to a pseudo-second-order model, and the adsorption isotherms were consistent with the Langmuir model. Thermodynamic analysis indicated that the adsorption process was endothermic and spontaneous, with an enthalpy change (ΔHθ) of 13.94 kJ/mol. Cyclic experiments showed that the adsorption capacity of P-EF-HMAC remained at approximately 80% of its initial value after four adsorption-desorption cycles, demonstrating excellent stability and reusability. The fiber membrane can be readily separated and recovered without intricate procedures, providing an efficient, sustainable and convenient solution for dye wastewater treatment.
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HU Yue, MA Hao, SONG Saiyi, GUO ruizhe, XIA Shuqian
2026,43(1)
Abstract:
To solve the problems of emulsification, viscosity reduction, and controllable demulsification of heavy oil, a pH-responsive heavy oil viscosity reducer, C16A-SiO2， was formed by the electrostatic interaction between cationic surfactant N,N-dimethylhexadecylamine (C16A) and SiO2 nanoparticles. And the performance and stability of the viscosity reducer were studied. When pH is 4.5 (±0.5), the viscosity reducer and the heavy oil can form a water-in-oil Pickering emulsion, the viscosity reduction rate for the heavy oil from Shengli Oilfield (viscosity of 5596 mPa·s，60 ℃) can be over 99.5%. The water separation rate is less than 20% after 8 hours. When pHis 8, the Pickering emulsion will breakdown rapidly. The structure of C16A-SiO2 was characterized by FTIR, TG, revealing a 27.3% grafting rate of C16A on SiO2. The Zeta potential, conductivity, surface tension, and contact angle were studied. The results showed that, when pH is 4.5 (±0.5), the viscosity reducer reveal the good surface activity, the surface tension of C16A-SiO2 aqueous solution dropped below 40 mN/m, the Zeta potential reached 42.5 mV, with a contact angle of 83.2°. The effects of pH, the mass fractions of C16A, and SiO2 NPs on the viscosity reduction rates and emulsion stability were studied. The optimal conditions for viscosity reduction were : pH is 4.5 (±0.5) , the mass fractions of C16A and SiO2 were 1.0% and 0.5%, respectively.
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FENG Tingyi, WANG Yuqin, ZANG Huiyu, ZHAO Chuanchuan, XIE Linhua
2026,43(1)
Abstract:
Using waste distiller"s grains as raw material, acrylic acid (AA) adjusted the neutralization degree, potassium persulfate (KPS) was used as the initiator, N,N-methylenebisacrylamide (NMBA) was used as the cross-linking agent, 2-acrylamino-2-methylpropanesulfonic acid (AMPS) was introduced as a salt-tolerant monomer, and humic acid (HA) was added, SEM, XRD and TGA were used to characterize and test the microscopic morphology, structure composition and thermal properties of DGC-HA, and the performance indexes of DGC-HA such as water absorption rate, salt absorption rate, nutrient loading rate and release rate, water retention rate and degradation rate were investigated. The results showed that the optimal conditions for the preparation of DGC-HA were as follows: the particle size of dried distiller"s grains powder was 32 mesh, the amount of AMPS was 0.75 g, the amount of HA was 0.4 g, the amount of NMBA was 0.03 g, the amount of KPS was 0.16 g and the neutralization degree of acrylic acid was 50%, and the maximum water absorption rate of DGC-HA was 380.74 g/g, and the saline absorption rate was 45.52 g/g. The water diffusion mechanism of DGC-HA was non-Fick diffusion, and the water retention rates at 20, 40 and 60 °C were 98%, 76% and 50%, respectively, and the recovery rate reached 72% after repeated water absorption for 5 times. The degradation rate of DGC-HA in soil was 39.5% after 30 days. The nutrient loading rate of DGC-HA for ammonium polyphosphate solution at a concentration of 30 g/L was as high as 64.75%, and the nutrient release rate at 72 h was as high as 64.75%. The cellulose and HA in the distiller"s grains were grafted and copolymerized to form a superabsorbent polymer with a three-dimensional network of porous cross-linked structures and surface morphology.
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2026,43(1)
Abstract:
To establish a visualized correlation between the micro- and meso-scale structures of hydroxyl-terminated polybutadiene (HTPB)-based polyurethane elastomers for crack detection, a dihydroxy-functionalized europium complex Eu(TTA)?DMPA was synthesized using 2-thenoyltrifluoroacetone (HTTA) and 2,2-bis(hydroxymethyl)propionic acid (DMPA) as ligands with trivalent europium ions (Eu3?) as the central metal. This complex was incorporated as a chain extender via covalent bonding during the hard segment synthesis of HTPB-based polyurethane elastomers, resulting in a elastomer (E-HTPB-PU) prepared through fluorescence labeling. The structural composition and fluorescence properties of Eu(TTA)?DMPA and E-HTPB-PU were characterized using FTIR and fluorescence spectroscopy. The effects of hard segment content (composed of [Eu(TTA)?DMPA and 1,4-butanediol (BDO)]) on mechanical properties and the fluorescence intensity-strain relationship during visualized tensile deformation were investigated through tensile testing and Abaqus simulation. Results demonstrated that the chemical formula of Eu(TTA)?DMPA was determined as Eu(C?H?O?SF?)?C?H?O?. The E-HTPB-PU exhibited tunable fluorescence intensity with optimal comprehensive mechanical properties at 15% hard segment content (E-HTPB-PU-15%), demonstrating a tensile strength of 1.212 MPa and elongation at break of 1074%. An inverse correlation was observed between tensile strain and fluorescence intensity in E-HTPB-PU, where increased deformation led to reduced fluorescence intensity, establishing a visualized correspondence between mechanical and chemical signals during tensile strain. Notably, microcrack formation during stretching induced molecular chain breakage or slippage, causing localized Eu aggregation near cracks. This phenomenon resulted in enhanced fluorescence intensity at fracture regions despite the overall intensity reduction during deformation.
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WANG He-jing, GAI Jun-liang, LI Dan-hui, ZHAO Li-li
2026,43(1)
Abstract:
The synthesis of cyclopentanone from biomass furfural hydrogenation-rearrangement in water not only solves the problem of energy consumption, but also meets the requirements of green and sustainable development, thereby improving the utilization rate of biomass energy. This paper presented the synthesis of cyclopentanone from furfural hydrogenation-rearrangement using Co/Nb2O5 as the catalyst under the condition of water as the solvent. The suitable reaction conditions were determined through single-factor experiments as follows: catalyst amount of 0.15 g, mass ratio of furfural to water of 1:20, reaction temperature of 160°C, reaction pressure of 3 MPa, and reaction time of 5 h. Under these conditions, the furfural conversion was 100%, and the selectivity of cyclopentanone was 77.6%. To further optimize the reaction conditions and improve the yield of cyclopentanone, the response surface methodology was used to optimize the reaction conditions. The results showed that the relationship between the catalyst amount, reaction temperature, reaction pressure, and cyclopentanone yield could be expressed by a second-order polynomial. The correlation coefficient R2 of the model was 0.9845, indicating a good agreement between the predicted values and the experimental values. The optimized reaction conditions were: catalyst amount of 0.242 g, reaction temperature of 163°C, and reaction pressure of 2 MPa. Under these conditions, the furfural conversion was 100%, and the selectivity of cyclopentanone was 81%.
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ZHANG Lin, WANG Yan-xian, CHEN Rui, LIU Chen-jiang, ZHANG Yong-hong
2026,43(1)
Abstract:
Twelve azophenol dyes were prepared by the tandem reaction of diazotization and coupling, using continuous flow chemistry technology with phenols, arylamines and sodium nitrite (molar ratio of 1:6:6) as starting materials, in a mixed solvent of ethanol and water, and with trifluoroacetic acid as a promoter. In substrate universality studies, it was demonstrated that both unsubstituted aniline and various electron-donating aromatic amines could efficiently undergo diazotization and subsequent coupled with 2-naphthol and resorcinol under mild reaction conditions. A series of azophenol dyes were obtained in the isolated yields of 76%~99% under optimized continuous flow conditions (0.04 mL/min flow rate) for 4.2 hours. The structures of the products were characterized and confirmed by nuclear magnetic resonance (NMR) spectroscopy. The stability operation experiment shows that this synthesis scheme has high stability and certain industrial application prospects. The traditional batch synthesis process has many problems. For example, diazonium salts are unstable and prone to decomposition, the temperature of the reaction system is difficult to control, there is an explosion risk, the synthesis efficiency is low, and the operation is cumbersome. In this method, after the diazonium salt was generated in the microreactor, it is in situ coupled with phenolic compounds to obtain azophenol dyes, avoiding the explosion risk caused by the large-scale generation of unstable diazonium salts and the drawback of producing by-products. At the same time, the use of green solvents reduces the environmental pollution risk, can simplify the process, reduce the cost, and improve the synthesis efficiency.
